This video is for Sibelius users who also use EWQL Sound libraries. When using 3rd party libraries, in most cases, a Soundset is needed. You can find a soundsets for your 3rd party library at:

wwwsoundsetproject.com

This tutorial explains how to build custom manual Soundsets and Playback Configurations in Sibelius using the EWQLSO soundset purchased from SoundSetProject.  Enjoy! 😉